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First Alert Smart Onelink Smoke + CO Alarm - Hardwired (1042137)
First Alert 1042137 One Link Wi-Fi Smoke And Carbon Monoxide Detector

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Onelink Smart Smoke + Carbon Monoxide Alarm - AC Power

Add intelligent protection to your home with the Onelink Smoke & Carbon Monoxide alarm. This 2-in-1 combo alarm detects both smoke and carbon monoxide. Regardless of whether you're home or away, you'll be notified when smoke or co is detected. This First Alert Onelink Combo Alarm is capable of identifying the type and location of the danger. You'll also be able to create a personalized smoke and carbon monoxide safety network by interconnecting other compatible alarms.

Mobile Connectivity through the Onelink Home App

This alarm sends you notifications in the event of a smoke or carbon monoxide emergency. With the Onelink Home app, you can also test and silence your alarm.

Smart Home Safety Network

Wirelessly interconnect with other First Alert & Onelink devices (sold separately) to create a smart home safety network. When one alarm is triggered, all connected devices will sound off. This alarm is also compatible with Amazon Alexa, so you can ask Alexa to check the status of your Onelink alarm. The Onelink Home App is compatible with both Android and Apple devices.

Voice Alerts and More

Emergency notifications alert you to danger via your phone, while voice and location technology tell you the type and area of danger; the Onelink also uses a traditional 85-decibel siren.

Hardwired Alarm with Easy Setup and Installation

The Onelink Smoke & Carbon Monoxide Alarm connects easily to electrical systems using the included AC adapter plugs so you don't have to rewire (AC power is required for Onelink). Includes a 10 year sealed lithium battery backup so you are always protected even in a power outage.

Battery Backup for Continuous Protection

This Hardwired Onelink Smoke & CO Alarm is equipped with a ten year sealed battery backup for protection during power outages.

Onelink Hardwired Smart Smoke + Carbon Monoxide Alarm (3nd Generation) 1042135 (Model #) 1042137 (sku #)

Generation Three Onelink Smart Smoke + Carbon Monoxide Alarm - AC Power

  • 2-in-1 Protection: Photoelectric Smoke and Electrochemical CO sensors
  • 10-year sealed battery backup provides continuous protection in the event of a power outage
  • No low battery chirps in the middle of the night
  • 85 decibel Alarm with Voice Alerts
  • Voice with Location - Voice announces programmed location of the unit and danger detected
  • Multicolor Indicator Ring Provides visual indication of various alarm states
  • Wi-Fi and Bluetooth Wireless Interconnect
  • Bluetooth Mesh Network Communication/2 way communication allows alarms to speak with one another
  • Utilization of Wi-Fi allows users to receive emergency notifications
  • Compatibility: Apple HomeKit and Google Play
  • Receive notifications via iPhone, iPad and iPad Touch (Requires iOS 9.0 or later)
  • Meets UL217 and UL2034 Standards for Smoke and CO Alarms
  • Product Dimensions (LxWxH): 5.88 x 5.88 x 1.57 in.
  • Product Weight: 0.75 lbs.
  • Warranty: 5 Year Limited
1042137 SKU:
First Alert Smart Onelink Smoke + CO Alarm - Hardwired

Average Rating: Average Rating: 4.5 of 5 4.5 of 5 Total Reviews: 4 Write a review »

  0 of 0 people found the following review helpful:
5 of 5 Great alternate to other smart smoke detectors July 12, 2021
Reviewer: Mike from Clarksburg, MD United States  
I shied away from brand G smoke detectors- due to privacy concerns. These first alert units are top notch. Note they can be integrated with other hard wired compatible smoke detectors. While an alarm on the non smart detectors will cause an audible alarm on the smart detector- the smart detector will not send an app notification as a result. The only time it will send an app notification is if the smart detector is the one alarming

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  0 of 0 people found the following review helpful:
5 of 5 January 27, 2021
Reviewer: Anthony Reinking from Fayetteville, GA United States  

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  0 of 0 people found the following review helpful:
3 of 5 Not-so-Interconnected August 31, 2020
Reviewer: William from Fullerton , CA United States  
After doing lots of research in building a smart, interconnected system, I was very disappointed during installation to learn that the Onelink product does NOT interconnect to the First Alert alarms that I also bought. I went back to the website to see what I missed, but found First Alert's language vague and missing  in regards to connecting First Alerts to Onelink. Wouldn't you think all of the company's products would be compatible???

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  0 of 0 people found the following review helpful:
5 of 5 WiFi smoke/co2 detectors May 8, 2018
Reviewer: Shannon Ramaswami from Cary, NC United States  
I am extremely satisfied. The detectors were $10/per less than anywhere else and they arrived at my house the day after I ordered them. Staff also quickly and professionally answered all questions I had.

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